<template>
 <li>
    <label for="">
      <input type="checkbox" :checked="todoObj.done" @change="handleCheck(todoObj.id)"/>
      <!-- 
        如下代码也能实现功能，但是不太推荐，因为有点违反原则，因为修改了props,只不过vue没有监测到
        <input type="checkbox" v-model="todoObj.done"/> -->
      <span> {{todoObj.title}}</span>
    </label>
    <button class="btn btn-danger" @click="handleDelete(todoObj.id)">删除</button>
 </li>
</template>

<script>
import pubsub from 'pubsub-js'
export default {
  name: 'TodoItem',
  props: ['todoObj'],
  methods: {
    handleCheck(id) {
      // 通知App组件将对应的todo对象的done值取反
      this.$bus.$emit('checkTodo', id)
    },
    handleDelete(id) {
      if(confirm('确定删除吗？')) {
        // this.$bus.$emit('deleteTodo', id)
        pubsub.publish('deleteTodo', id)
      }
    }
  }
}
</script>
<style lang="less" scpoed>
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
  label {
    float: left;
    cursor: pointer;
  }
  button {
    float: right;
    display: none;
    margin-top: 3px;
  }
}
li input li label {
  vertical-align: middle;
  margin-right: 6px;
}
li:before {
  content: initial;
}
li:last-child {
  border-bottom: none;
}
li:hover {
  background: #fafafa;
  button {
    display: block;
  }
}
</style>
